#include <cstdio>
#include <cstring>

int main()
{
    char str1[] = "hello world";
    char str2[] = "hello world";
    const char *str3 = "hello world";
    const char *str4 = "hello world";

    if (str1 == str2)
        printf("str1 == str2\n");
    else
        printf("str1 != str2\n");

    if (str3 == str4)
        printf("str3 == str4\n");
    else
        printf("str3 != str4\n");
}
